import sys s1 = sys.argv[1] s2 = sys.argv[2] l1 = len(s1) l2 = len(s2) #Whoa alex wtf does this do? #Well, it's an easy way of making an array of 0s that's (l1+1)x(l2+1) #...it's just not very readable. a = [x[:] for x in [[0]*(l1+1)]*(l2+1)] def cost(x, y): if s1[y] == s2[x]: return a[x][y] else: return min(a[x+1][y],a[x][y+1],a[x][y])+1 print " ", for i in s2: print "%3s" % i, print "" for y in range(len(s1)): print "%s" % s1[y], for x in range(len(s2)): c = cost(x,y) a[x+1][y+1] = c print "%3s" % c, print "" m = a[l2][l1] lm = min(l1,l2) for y in range(lm-1, l1): for x in range(lm-1, l2): c = a[x+1][y+1] if c < m: m = c print "\nOptimal Distance: %d" % m
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